Angle-steel



No. 748,736. l PATENTED JAN. 5, 1904. H. G. M. HOWARD. ANGLE STEEL.

APPLIGATIGN FILED APR. 25. 1903.

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Patented January 5, 1904.

PATENT OFFICE.

HENRY G. M. HOWARD, OF KALAMAZOO, MICHIGAN.

ANGLE-STEEL.

SPECIFICATION forming part of Letters Patent No. 748,736, dated January 5, 1904:. Application filed April 25, 1903. Serial No. 154.225- (No model.)

To all whom it may concern.-

Be it known that I, HENRY G.M. HOWARD, a citizen of the United States, and a resident of Kalamazoo, in the county of Kalamazoo, State of Michigan, have invented a new and useful article of manufacture, Angle-Steel, of which the following is a specification.

This invention in general relates to anglesteel procurable in the regular proper market as an article of manufacture to be used in the production of many difierent devices.

The object of this invention is to produce a manufactured article known as angle-steel having a number of improved features especially adapting it to enter into the construction of other new and useful things, I being already engaged in the manufacture of the said herein-described new angle-steel for the trade.

In the accompanying drawings, forming a part of this specification, Figure 1 is an enlarged broken end perspective view of a bar of the new article of manufacture; Fig. 2, a broken plan of Fig. 3 looking from a point below, and Fig. 3 is a full-size end view of the smallest I am now producing.

Referringto the parts of the drawings pointed out by numerals, 4 is the vertical member, and 5 is the horizontal member, which join each other at an edge of each integrally, and are thus at right angles in end view or cross-section. It is important that v the vertical member 4 be made wider between 6 and 7 or between 6 and Sthan is the width of the horizontal member 5 between 9 and 10 or between 8 and 10 and that the vertical member 4 be made thicker than the horizontal member 5 proper in order that the construction at the one side of the inner side of the vertical member 4: shall counterbalance that at the other side when including the rib 11, which is integral with the under side of the horizontal member 5.' The construction of this rib ll and its relation and association with other parts are peculiar. After establishing the condition of the horizontal member 5, making it thin as possible with needed strength, this having been arrived at by tests,

7 then the rib 11 must be prominent and yet not sufficient that its bulk, combined with that of the horizontal member 5, with which it is formed integral, will overbalance the other member 4:. These parts are thus proportioned in relation to each other, but may be individually varied if found advisable.

On each side of the rib 11 where it blends with the under flat surface of the horizontal member at 12 and 13 it is slightly concaved to prevent anything like or approaching to right-angled corners at these points,as clearly shown in Fig.1. The balance of the exterior surface of the rib 11 consists of a convex face 14: on one side and .a convex face 15 on the other side, joining the concaves 12 and 13 and joining each other at the central ridge 16. This rib 11 is thus specifically described, because it is not describable that it shall be in end view either V-shaped, U-shaped, or convexed as a whole, but the shape herein shown, although some may make modifications in the forms of parts, if desired.

It is not deemed advisable to herein de-. scribe, thus disclosing to the public the de- I vices, articles, and machines into the manufacture of which my invention is adapted to enter, for they are to be subjects of patents, and of course there will likely be many more of which I have no knowledge.

Having thus described my invention, what I claim as new,and desire to secure by Letters Patent of the United States of America, is-

1. As a new article of manufacture, metal bars consisting of the integral members at right angles in cross-section, one member being wider and thicker than the other, the narrowest and thinnest being provided on the under side with a rib integral therewith and of bulk corresponding with the difference between the two members, substantially as set forth.

2. As a new article of manufacture, metal barsconsisting of the integral members at right angles in cross-section,one member being wider and thicker than the other,the thinnest and narrowest being provided with an integral rib on its under side of bulk correspond- 

